Journal cover Journal topic
Web Ecology An open-access peer-reviewed journal
Journal topic
Volume 12, issue 1
Web Ecol., 12, 1–7, 2012
https://doi.org/10.5194/we-12-1-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
Web Ecol., 12, 1–7, 2012
https://doi.org/10.5194/we-12-1-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

Standard article 20 Apr 2012

Standard article | 20 Apr 2012

The time lag between introduction and escape from cultivation of alien woody plant species decreases with polyploidization

M. Brändle and R. Brandl M. Brändle and R. Brandl
  • Animal Ecology, Department of Ecology, Faculty of Biology, Philipps-Universität Marburg, Karl-von-Frisch Str. 8, 35032 Marburg, Germany

Abstract. The time between introduction of an alien species and escape from cultivation shows considerable variation among species. One hypothesis to explain this variation of the time lag invokes the evolution of genotypes adapted to the conditions of the new environment. Here, we analyse the variation in time lags among 53 alien woody plant species in Germany. Accounting for the effects of time since introduction, growth form (trees versus shrubs), biogeography and taxonomic isolation (presence or absence of a native congener in the adventive area) we found that the time lag decreases with increasing polyploidization. By contrast, the haploid chromosome number was not significantly related to the time lag. These results provide evidence for the hypothesis that recent genome duplication events are important for a fast escape from cultivation of an alien woody plant species. We suggest that a large number of duplicated chromosomes increase the partitioning of the genome and hence the average rate of recombination between loci facilitating the formation of adaptive genotypes.

Publications Copernicus
Download
Citation